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f7af697762
Now that paravirt is using the alternatives patching infrastructure, remove the paravirt patching code. Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20231210062138.2417-6-jgross@suse.com
278 lines
7.1 KiB
C
278 lines
7.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/* Paravirtualization interfaces
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Copyright (C) 2006 Rusty Russell IBM Corporation
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2007 - x86_64 support added by Glauber de Oliveira Costa, Red Hat Inc
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*/
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/export.h>
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#include <linux/efi.h>
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#include <linux/bcd.h>
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#include <linux/highmem.h>
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#include <linux/kprobes.h>
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#include <linux/pgtable.h>
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#include <linux/static_call.h>
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#include <asm/bug.h>
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#include <asm/paravirt.h>
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#include <asm/debugreg.h>
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#include <asm/desc.h>
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#include <asm/setup.h>
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#include <asm/time.h>
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#include <asm/pgalloc.h>
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#include <asm/irq.h>
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#include <asm/delay.h>
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#include <asm/fixmap.h>
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#include <asm/apic.h>
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#include <asm/tlbflush.h>
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#include <asm/timer.h>
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#include <asm/special_insns.h>
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#include <asm/tlb.h>
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#include <asm/io_bitmap.h>
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#include <asm/gsseg.h>
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/* stub always returning 0. */
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DEFINE_ASM_FUNC(paravirt_ret0, "xor %eax,%eax", .entry.text);
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void __init default_banner(void)
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{
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printk(KERN_INFO "Booting paravirtualized kernel on %s\n",
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pv_info.name);
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}
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#ifdef CONFIG_PARAVIRT_XXL
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DEFINE_ASM_FUNC(_paravirt_ident_64, "mov %rdi, %rax", .text);
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DEFINE_ASM_FUNC(pv_native_save_fl, "pushf; pop %rax", .noinstr.text);
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DEFINE_ASM_FUNC(pv_native_irq_disable, "cli", .noinstr.text);
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DEFINE_ASM_FUNC(pv_native_irq_enable, "sti", .noinstr.text);
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DEFINE_ASM_FUNC(pv_native_read_cr2, "mov %cr2, %rax", .noinstr.text);
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#endif
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DEFINE_STATIC_KEY_TRUE(virt_spin_lock_key);
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void __init native_pv_lock_init(void)
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{
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if (IS_ENABLED(CONFIG_PARAVIRT_SPINLOCKS) &&
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!boot_cpu_has(X86_FEATURE_HYPERVISOR))
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static_branch_disable(&virt_spin_lock_key);
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}
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static void native_tlb_remove_table(struct mmu_gather *tlb, void *table)
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{
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tlb_remove_page(tlb, table);
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}
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struct static_key paravirt_steal_enabled;
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struct static_key paravirt_steal_rq_enabled;
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static u64 native_steal_clock(int cpu)
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{
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return 0;
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}
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DEFINE_STATIC_CALL(pv_steal_clock, native_steal_clock);
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DEFINE_STATIC_CALL(pv_sched_clock, native_sched_clock);
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void paravirt_set_sched_clock(u64 (*func)(void))
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{
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static_call_update(pv_sched_clock, func);
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}
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/* These are in entry.S */
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static struct resource reserve_ioports = {
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.start = 0,
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.end = IO_SPACE_LIMIT,
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.name = "paravirt-ioport",
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.flags = IORESOURCE_IO | IORESOURCE_BUSY,
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};
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/*
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* Reserve the whole legacy IO space to prevent any legacy drivers
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* from wasting time probing for their hardware. This is a fairly
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* brute-force approach to disabling all non-virtual drivers.
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*
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* Note that this must be called very early to have any effect.
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*/
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int paravirt_disable_iospace(void)
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{
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return request_resource(&ioport_resource, &reserve_ioports);
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}
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#ifdef CONFIG_PARAVIRT_XXL
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static noinstr void pv_native_write_cr2(unsigned long val)
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{
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native_write_cr2(val);
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}
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static noinstr unsigned long pv_native_get_debugreg(int regno)
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{
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return native_get_debugreg(regno);
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}
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static noinstr void pv_native_set_debugreg(int regno, unsigned long val)
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{
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native_set_debugreg(regno, val);
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}
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noinstr void pv_native_wbinvd(void)
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{
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native_wbinvd();
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}
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static noinstr void pv_native_safe_halt(void)
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{
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native_safe_halt();
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}
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#endif
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struct pv_info pv_info = {
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.name = "bare hardware",
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#ifdef CONFIG_PARAVIRT_XXL
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.extra_user_64bit_cs = __USER_CS,
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#endif
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};
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/* 64-bit pagetable entries */
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#define PTE_IDENT __PV_IS_CALLEE_SAVE(_paravirt_ident_64)
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struct paravirt_patch_template pv_ops = {
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/* Cpu ops. */
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.cpu.io_delay = native_io_delay,
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#ifdef CONFIG_PARAVIRT_XXL
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.cpu.cpuid = native_cpuid,
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.cpu.get_debugreg = pv_native_get_debugreg,
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.cpu.set_debugreg = pv_native_set_debugreg,
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.cpu.read_cr0 = native_read_cr0,
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.cpu.write_cr0 = native_write_cr0,
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.cpu.write_cr4 = native_write_cr4,
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.cpu.wbinvd = pv_native_wbinvd,
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.cpu.read_msr = native_read_msr,
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.cpu.write_msr = native_write_msr,
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.cpu.read_msr_safe = native_read_msr_safe,
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.cpu.write_msr_safe = native_write_msr_safe,
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.cpu.read_pmc = native_read_pmc,
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.cpu.load_tr_desc = native_load_tr_desc,
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.cpu.set_ldt = native_set_ldt,
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.cpu.load_gdt = native_load_gdt,
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.cpu.load_idt = native_load_idt,
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.cpu.store_tr = native_store_tr,
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.cpu.load_tls = native_load_tls,
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.cpu.load_gs_index = native_load_gs_index,
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.cpu.write_ldt_entry = native_write_ldt_entry,
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.cpu.write_gdt_entry = native_write_gdt_entry,
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.cpu.write_idt_entry = native_write_idt_entry,
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.cpu.alloc_ldt = paravirt_nop,
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.cpu.free_ldt = paravirt_nop,
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.cpu.load_sp0 = native_load_sp0,
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#ifdef CONFIG_X86_IOPL_IOPERM
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.cpu.invalidate_io_bitmap = native_tss_invalidate_io_bitmap,
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.cpu.update_io_bitmap = native_tss_update_io_bitmap,
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#endif
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.cpu.start_context_switch = paravirt_nop,
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.cpu.end_context_switch = paravirt_nop,
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/* Irq ops. */
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.irq.save_fl = __PV_IS_CALLEE_SAVE(pv_native_save_fl),
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.irq.irq_disable = __PV_IS_CALLEE_SAVE(pv_native_irq_disable),
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.irq.irq_enable = __PV_IS_CALLEE_SAVE(pv_native_irq_enable),
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.irq.safe_halt = pv_native_safe_halt,
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.irq.halt = native_halt,
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#endif /* CONFIG_PARAVIRT_XXL */
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/* Mmu ops. */
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.mmu.flush_tlb_user = native_flush_tlb_local,
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.mmu.flush_tlb_kernel = native_flush_tlb_global,
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.mmu.flush_tlb_one_user = native_flush_tlb_one_user,
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.mmu.flush_tlb_multi = native_flush_tlb_multi,
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.mmu.tlb_remove_table = native_tlb_remove_table,
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.mmu.exit_mmap = paravirt_nop,
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.mmu.notify_page_enc_status_changed = paravirt_nop,
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#ifdef CONFIG_PARAVIRT_XXL
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.mmu.read_cr2 = __PV_IS_CALLEE_SAVE(pv_native_read_cr2),
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.mmu.write_cr2 = pv_native_write_cr2,
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.mmu.read_cr3 = __native_read_cr3,
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.mmu.write_cr3 = native_write_cr3,
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.mmu.pgd_alloc = __paravirt_pgd_alloc,
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.mmu.pgd_free = paravirt_nop,
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.mmu.alloc_pte = paravirt_nop,
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.mmu.alloc_pmd = paravirt_nop,
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.mmu.alloc_pud = paravirt_nop,
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.mmu.alloc_p4d = paravirt_nop,
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.mmu.release_pte = paravirt_nop,
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.mmu.release_pmd = paravirt_nop,
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.mmu.release_pud = paravirt_nop,
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.mmu.release_p4d = paravirt_nop,
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.mmu.set_pte = native_set_pte,
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.mmu.set_pmd = native_set_pmd,
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.mmu.ptep_modify_prot_start = __ptep_modify_prot_start,
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.mmu.ptep_modify_prot_commit = __ptep_modify_prot_commit,
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.mmu.set_pud = native_set_pud,
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.mmu.pmd_val = PTE_IDENT,
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.mmu.make_pmd = PTE_IDENT,
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.mmu.pud_val = PTE_IDENT,
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.mmu.make_pud = PTE_IDENT,
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.mmu.set_p4d = native_set_p4d,
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#if CONFIG_PGTABLE_LEVELS >= 5
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.mmu.p4d_val = PTE_IDENT,
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.mmu.make_p4d = PTE_IDENT,
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.mmu.set_pgd = native_set_pgd,
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#endif /* CONFIG_PGTABLE_LEVELS >= 5 */
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.mmu.pte_val = PTE_IDENT,
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.mmu.pgd_val = PTE_IDENT,
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.mmu.make_pte = PTE_IDENT,
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.mmu.make_pgd = PTE_IDENT,
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.mmu.enter_mmap = paravirt_nop,
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.mmu.lazy_mode = {
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.enter = paravirt_nop,
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.leave = paravirt_nop,
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.flush = paravirt_nop,
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},
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.mmu.set_fixmap = native_set_fixmap,
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#endif /* CONFIG_PARAVIRT_XXL */
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#if defined(CONFIG_PARAVIRT_SPINLOCKS)
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/* Lock ops. */
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#ifdef CONFIG_SMP
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.lock.queued_spin_lock_slowpath = native_queued_spin_lock_slowpath,
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.lock.queued_spin_unlock =
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PV_CALLEE_SAVE(__native_queued_spin_unlock),
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.lock.wait = paravirt_nop,
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.lock.kick = paravirt_nop,
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.lock.vcpu_is_preempted =
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PV_CALLEE_SAVE(__native_vcpu_is_preempted),
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#endif /* SMP */
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#endif
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};
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#ifdef CONFIG_PARAVIRT_XXL
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NOKPROBE_SYMBOL(native_load_idt);
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#endif
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EXPORT_SYMBOL(pv_ops);
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EXPORT_SYMBOL_GPL(pv_info);
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